[Bug 258049] vm_reserv_depopulate panic.

From: <bugzilla-noreply_at_freebsd.org>
Date: Wed, 25 Aug 2021 21:10:29 UTC

Jessica Clarke <jrtc27@freebsd.org> changed:

           What    |Removed                     |Added
                 CC|                            |jrtc27@freebsd.org

--- Comment #1 from Jessica Clarke <jrtc27@freebsd.org> ---
Re observed on amd64, Google has 5 hits (I assume this bug report will shortly
appear too) for `"vm_reserv_depopulate" "is clear"`, all but one of which are
just for the code, with the final one being for this 5 year old GitHub Gist
https://gist.github.com/nomadlogic/ba58e8fd01267fbf7a2fa4fcee29e2f7 that was
for FreeBSD 12.0-CURRENT on amd64 when using the old freebsd-base-graphics

Looking at vm_reserv itself, whilst a caller can do stupid things and
potentially cause crashes, my initial reading is that this KASSERT should be
impossible no matter what the caller is doing.

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